Chu Chu¹, Hong-Mei Ding^1,

Background: Analyzed pathogenic bacteria isolated from bile samples of patients with biliary tract infection and their drug resistance in the first Affiliated Hospital of Nanjing Medical University from 2017 to 2020, so as to provide evidence for the treatment of biliary tract infection. Methods: Clinical strains isolated from bile specimens of patients suspected of biliary infection in the First Affiliated Hospital of Nanjing Medical University from 2017 to 2020 were collected, The drug susceptibility criteria are based on the standards published by the National Standardization Committee of the US Clinical Laboratories. WHONET 5.6 software was used to analyze the distribution of pathogens and drug resistance. Results: From January 2017 to December 2020, a total of 2006 strains of bile pathogenic bacteria were cultured and identified. There were 1253 cases of gram-negative bacilli, 638 cases of gram-positive cocci, 98 cases of fungi, and 17 cases of Gram-positive bacilli. The top five pathogens of Gram negative bacilli were Escherichia coli, Klebsiella pneumoniae, Enterobacter cloacae, Pseudomonas aeruginosa, Acinetobacter baumannii. The top five pathogens of gram positive cocci were Enterococcus faecium, Enterococcus faecalis, Enterococcus gallinarum, Enterococcus faecalis and Staphylococcus epidermidis. the resistance rate of Escherichia coli to ampicillin, ampicillin / sulbactam, cefotetan, ceftazidime, ceftriaxone,cefepime, itronam, compound trimethoprim decreased, the resistance rate of Klebsiella pneumoniae to gentamicin, levofloxacin decreased, the resistance rate of Enterobacter cloacae to ciprofloxacin, levofloxacin decreased. the resistance rate of Pseudomonas aeruginosa to ceftazidime, cefepime, gentamicin decreased. the resistance rate of Acinetobacter baumannii to ceftazidime, ciprofloxacin decreased. the resistance rate of Enterococcus faecium to penicillin G, high concentration streptomycin, erythromycin decreased. Conclusions: Enterogenic pathogens were the main pathogens in China. Such as Escherichia coli, Klebsiella pneumoniae, Enterococcus faecalis and Enterococcus faecalis; Nosocomial infection pathogens. For example, Pseudomonas aeruginosa and Acinetobacter also need to be paid attention to. Clinicians should improve their awareness of microbiological examination and provide more reliable pathogenic evidence for the selection of clinical antibiotic.

Biliary tract infection, pathogenic bacteria, drug resistance, Nanjing